I’ve already built an IVR in Twilio that forwards every inbound call to our SIP endpoint and works well. The next piece I need is shared call-park lines so any agent can place a caller on hold and another agent can resume the same call from a different phone. For now I only need between one and five park lines configured, but the solution should be easy to extend later. Key points you should know while quoting: • Platform is Twilio Programmable Voice; SIP trunking is active and tested. • I’m not yet sure whether I want custom announcements during the park/unpark process—please implement a standard message first and keep the flow ready for a quick swap to a custom clip if we decide to record one. • All work has to fit a fixed fee of $50; I’m happy to split that 60 % on a working demo, 40 % on final hand-over. Deliverables I will use for acceptance: 1. Up to five functioning shared park lines reachable from our existing IVR flow. 2. Ability to place, park, and retrieve a live call from two different SIP phones. 3. Clear notes (or brief README) showing where to upload custom audio and how to add more park slots later. If your solution relies on TwiML, Studio, server-side code (Node.js, Python, etc.) or specific SIP headers, please include the snippets so I can reproduce them. Once the above criteria pass in my Twilio console, the project is complete and payment releases immediately.